Am planning to create a blog on bitcoins, a blog which will contain all bitcoin related tutorials, guides, and tips. But my problem is that if the value of bitcoin goes down, my blog may lose value and i might lose traffic as well. Pls is it still advisable to create the blog?

I dont think bitcoin will be eliminated soon, okay i get you! You mean its worth might diminish soon. Then My question is , did you expect any currency to appreciate with time without having to depreciate at one time? Answer that yourself so you are asking whether you should not create a blog for it.

Well "The best time to plant a tree is 20years earlier,the next best time is now"-anonymous

Something like this one https://cryptomarketwire.com/ ? Cryptocurrency is extremely popular niche now, more and more people are searching info about Blockchain, Bitcoins, etc. I wouldn't dedicate a blog to Bitcoin only, because other crypto currencies are growing in price, too, and people are already looking for alternative coins to invest money in. Good luck!